Package it.unimi.dsi.fastutil.io

Class FastByteArrayInputStream

java.lang.Object
java.io.InputStream
it.unimi.dsi.fastutil.io.MeasurableInputStream
it.unimi.dsi.fastutil.io.FastByteArrayInputStream
All Implemented Interfaces:
MeasurableStream, RepositionableStream, Closeable, AutoCloseable
public class FastByteArrayInputStream extends MeasurableInputStream implements RepositionableStream
Simple, fast and repositionable byte-array input stream.

Warning: this class implements the correct semantics of read(byte[], int, int) as described in InputStream. The implementation given in ByteArrayInputStream is broken, but it will never be fixed because it's too late.

Author:
Sebastiano Vigna

  • Field Details

    • array

      public byte[] array
      The array backing the input stream.

    • offset

      public int offset
      The first valid entry.

    • length

      public int length
      The number of valid bytes in array starting from offset.

  • Constructor Details

    • FastByteArrayInputStream

      public FastByteArrayInputStream(byte[] array, int offset, int length)
      Creates a new array input stream using a given array fragment.
      Parameters:
      array - the backing array.
      offset - the first valid entry of the array.
      length - the number of valid bytes.

    • FastByteArrayInputStream

      public FastByteArrayInputStream(byte[] array)
      Creates a new array input stream using a given array.
      Parameters:
      array - the backing array.

  • Method Details

    • markSupported

      public boolean markSupported()
      Overrides:
      markSupported in class InputStream

    • reset

      public void reset()
      Overrides:
      reset in class InputStream

    • close

      public void close()
      Closing a fast byte array input stream has no effect.
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Overrides:
      close in class InputStream

    • mark

      public void mark(int dummy)
      Overrides:
      mark in class InputStream

    • available

      public int available()
      Overrides:
      available in class InputStream

    • skip

      public long skip(long n)
      Overrides:
      skip in class InputStream

    • read

      public int read()
      Specified by:
      read in class InputStream

    • read

      public int read(byte[] b, int offset, int length)
      Reads bytes from this byte-array input stream as specified in InputStream.read(byte[], int, int). Note that the implementation given in ByteArrayInputStream.read(byte[], int, int) will return -1 on a zero-length read at EOF, contrarily to the specification. We won't.
      Overrides:
      read in class InputStream

    • position

      public long position()
      Description copied from interface: RepositionableStream
      Returns the current stream position.
      Specified by:
      position in interface MeasurableStream
      Specified by:
      position in interface RepositionableStream
      Returns:
      the current stream position.

    • position

      public void position(long newPosition)
      Description copied from interface: RepositionableStream
      Sets the current stream position.
      Specified by:
      position in interface RepositionableStream
      Parameters:
      newPosition - the new stream position.

    • length

      public long length()
      Description copied from interface: MeasurableStream
      Returns the overall length of this stream (optional operation). In most cases, this will require the stream to perform some extra action, possibly changing the state of the input stream itself (typically, reading all the bytes up to the end, or flushing on output stream). Implementing classes should always document what state will the input stream be in after calling this method, and which kind of exception could be thrown.
      Specified by:
      length in interface MeasurableStream